Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5213276 | Self-threading journal printer | David E. Weeks, Robert L. Wirth | 1993-05-25 |
| 4780007 | Record media thickness compensating mechanism | David E. Weeks, Robert L. Wirth, Winston B. Ferguson | 1988-10-25 |
| 4773772 | Printing apparatus | Robert L. Wirth, Richard S. Beardsley, II | 1988-09-27 |
| 4632580 | Dot matrix print head dampening mechanism | Robert L. Wirth, Hillis L. Wilson | 1986-12-30 |